Fig. 1From: Frequency-swept feedback interferometry for noncooperative-target ranging with a stand-off distance of several hundred metersa Principle diagram of the FSFI ranging system. BS, beam splitter; PD, photodetector; R, reflector. b Waveform of the swept optical frequency. c Typical intensity spectrum of a single-frequency fiber laser output. d Configuration of the FSFI ranging system with optical-path-length drift compensationBack to article page